Molecularity of Reaction

Q. The rate constant of reaction is $1.2\times {10}^{-1}mo{l}^{-2}lite{r}^2{s}^{-1}$ , the order of the reaction is

1. zero
2. 1
3. 2
4. 3

Q.

What are elementary reactions involving two reactants called?

Q. For a complex (multistep) reaction,

1. the overall rate of the reaction is the rate of the slowest step.
2. the overall molecularity has no significance.
3. molecularity and order may or may not be same.
4. the number of rate-determining steps may be more than one.

Q.

Which among the following is a false statement?

1. Rate of zero order reaction is independent of initial concentration of reactant

2. Half-life of a third order reaction is inversely proportional to the square of initial concentration of the reactant

3. For a first order reaction $t_{\frac{1}{2}}=\frac{0.693}{k}$

4. Molecularity of a reaction may be zero or fraction